Article ID Journal Published Year Pages File Type
5399551 Journal of Luminescence 2014 5 Pages PDF
Abstract
Difference fluorescence line-narrowing spectra are studied for evaluating the temperature dependence of the linear electron-phonon and vibronic coupling strengths in the two weakly coupled low-temperature glassy systems: chlorin-doped 1-propanol and the native Fenna-Matthews-Olson (FMO) light-harvesting protein complex folded with bacteriochlophyll a chromophores. Roughly three-fold increases of the electron-phonon coupling strength and constant vibronic couplings were observed in both systems in the available temperature range from 4.5 to 70 K. However, while the chlorin system is amenable to simple modeling of impurity spectra, the FMO shows significant deviations, consistent with the complex (exciton) nature of its lowest-energy singlet electronic transition.
Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
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